net.sf.ehcache.constructs.readthrough
Class ReadThroughCache

java.lang.Object
  net.sf.ehcache.constructs.EhcacheDecoratorAdapter
      net.sf.ehcache.constructs.readthrough.ReadThroughCache

All Implemented Interfaces:

Cloneable, Ehcache, InternalEhcache

public class ReadThroughCache
extends EhcacheDecoratorAdapter

This class implements the simplest of all possible read through cache behaviors, where a call the get() will delegate to a call to getWithLoader(). This means that a get() call can take a long time; beware. It also does no more locking than Cache.java implements; each separate cache may try to load a key at the same time.

Author:

cschanck

Field Summary

Fields inherited from class net.sf.ehcache.constructs.EhcacheDecoratorAdapter

underlyingCache

Constructor Summary

ReadThroughCache(Ehcache underlyingCache, ReadThroughCacheConfiguration config)

Method Summary

Element	get(Object key) Gets an element from the cache.
Element	get(Serializable key) Gets an element from the cache.
String	getName() Gets the cache name.

Methods inherited from class net.sf.ehcache.constructs.EhcacheDecoratorAdapter

acquireReadLockOnKey, acquireWriteLockOnKey, addPropertyChangeListener, bootstrap, calculateInMemorySize, calculateOffHeapSize, calculateOnDiskSize, clone, createQuery, disableDynamicFeatures, dispose, evictExpiredElements, flush, getAll, getAllWithLoader, getBootstrapCacheLoader, getCacheConfiguration, getCacheEventNotificationService, getCacheExceptionHandler, getCacheManager, getDiskStoreSize, getGuid, getInternalContext, getKeys, getKeysNoDuplicateCheck, getKeysWithExpiryCheck, getMemoryStoreSize, getOffHeapStoreSize, getQuiet, getQuiet, getRegisteredCacheExtensions, getRegisteredCacheLoaders, getRegisteredCacheWriter, getSearchAttribute, getSize, getStatistics, getStatus, getWithLoader, getWriterManager, hasAbortedSizeOf, initialise, isClusterBulkLoadEnabled, isClusterCoherent, isDisabled, isElementInMemory, isElementInMemory, isElementOnDisk, isElementOnDisk, isExpired, isKeyInCache, isNodeBulkLoadEnabled, isNodeCoherent, isReadLockedByCurrentThread, isSearchable, isValueInCache, isWriteLockedByCurrentThread, load, loadAll, put, put, putAll, putIfAbsent, putIfAbsent, putQuiet, putWithWriter, recalculateSize, registerCacheExtension, registerCacheLoader, registerCacheWriter, registerDynamicAttributesExtractor, releaseReadLockOnKey, releaseWriteLockOnKey, remove, remove, remove, remove, removeAll, removeAll, removeAll, removeAll, removeAndReturnElement, removeElement, removePropertyChangeListener, removeQuiet, removeQuiet, removeWithWriter, replace, replace, setBootstrapCacheLoader, setCacheExceptionHandler, setCacheManager, setDisabled, setName, setNodeBulkLoadEnabled, setNodeCoherent, setTransactionManagerLookup, toString, tryReadLockOnKey, tryWriteLockOnKey, unregisterCacheExtension, unregisterCacheLoader, unregisterCacheWriter, waitUntilClusterBulkLoadComplete, waitUntilClusterCoherent

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ReadThroughCache

public ReadThroughCache(Ehcache underlyingCache,
                        ReadThroughCacheConfiguration config)

Parameters:

underlyingCache -

config -

Method Detail

get

public Element get(Object key)
            throws IllegalStateException,
                   CacheException

Description copied from class: EhcacheDecoratorAdapter

Gets an element from the cache. Updates Element Statistics

Note that the Element's lastAccessTime is always the time of this get. Use Ehcache.getQuiet(Object) to peek into the Element to see its last access time with get

Specified by:

get in interface Ehcache

Overrides:

get in class EhcacheDecoratorAdapter

Parameters:

key - an Object value

Returns:

the element, or null, if it does not exist.

Throws:

IllegalStateException - if the cache is not Status.STATUS_ALIVE

CacheException

See Also:

Ehcache.isExpired(net.sf.ehcache.Element)

get

public Element get(Serializable key)
            throws IllegalStateException,
                   CacheException

Description copied from class: EhcacheDecoratorAdapter

Gets an element from the cache. Updates Element Statistics

Note that the Element's lastAccessTime is always the time of this get. Use Ehcache.getQuiet(Object) to peak into the Element to see its last access time with get

Specified by:

get in interface Ehcache

Overrides:

get in class EhcacheDecoratorAdapter

Parameters:

key - a serializable value

Returns:

the element, or null, if it does not exist.

Throws:

IllegalStateException - if the cache is not Status.STATUS_ALIVE

CacheException

See Also:

Ehcache.isExpired(net.sf.ehcache.Element)

getName

public String getName()

Description copied from class: EhcacheDecoratorAdapter

Gets the cache name.

Specified by:

getName in interface Ehcache

Overrides:

getName in class EhcacheDecoratorAdapter